Telecommunications is
any process that enables one or more users to pass to one
or more other users information of any nature delivered in
any usable form, by wire, radio, visual, or other
electrical, electromagnetic, optical means. The word is
derived from the Greek tele, "far off," and the Latin
communicare "to share."

A telecommunications network is a system of interconnected
facilities designed to carry traffic from a variety
of telecommunications services. The network has two
different but related aspects. In terms of its physical
components, it is a facilities network. In terms of the
variety of telecommunications services that it provides,
it can support a set of many traffic networks, each
representing a particular interconnection of facilities.